Modbus protocol conversion system based on 3G (The 3rd Generation Telecommunication) Internet access

Abstract

A Modbus protocol conversion device based on 3G Internet access belongs to the protocol conversion device in the field of network technology. Aiming at the unstable problem of 3G dial-up Internet access and ensuring the correctness and transparency of data transmission during Modbus protocol conversion, the present invention adopts a Modbus protocol conversion device based on 3G Internet access. The hardware architecture requires remote servers, protocol conversion devices and data acquisition equipment. The 3G script completes the dial-up PPP automatic detection network, and automatically redials when the network is disconnected or the ping fails. The data communication between the protocol conversion device and the server adopts the Modbus TCP protocol, and the data communication between the protocol conversion device and the data acquisition equipment adopts the Modbus RTU protocol. Data transmission realizes transparent transmission, and the protocol conversion device can quickly detect abnormal disconnection of the network and automatically reconnect, ensuring stable and durable operation, and can be used in more environments.

Description

technical field [0001] The invention relates to a protocol conversion system in the field of network technology, and is a Modbus protocol conversion system. Background technique [0002] There is a basic problem in the remote monitoring system, which is the interconnection of fieldbus and Ethernet. In April 2003, the third edition of the IEC61158Ed.3 fieldbus standard officially became an international standard, specifying 10 types of fieldbuses. At present, there are many types of fieldbuses with different standards. Therefore, when interconnecting with Ethernet, the first thing to encounter is the problem of protocol conversion. The Modbus protocol invented by Schneider Corporation is a network communication protocol widely used in the industrial field, and it has become a general standard. Through this protocol, the server and the protocol conversion device can communicate via the network. [0003] After searching the existing documents, we found the Chinese patent app...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of unstable Internet access and low normal access rate of the existing 3G network, the present invention adopts a Modbus protocol conversion system based on 3G Internet access to effectively ensure the correctness and transparency of data transmission during Modbus protocol conversion. Good stability, effectively improving the normal network access rate of the protocol conversion device

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